Stone-tool.



C. KILBURN.

STONE TOOL.

APPLICATION FILED JAN. 13. 1913.

Patented Jan. 30, 1917.

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1 mm]: Psrzns m. rnomunw C. KILBURN.

STONE TOOL.

APPLICATION FILED JAN. 13, I913.

Patented Jan. 30, 1917.

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STONE TOOL.

APPLICATION man JAN. 13, 19x3.

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Patented Jan. 30

CHARLES KILBURN, 0F CINCINNATI, OHIO.

STONE-TOOL.

Specification of Letters Patent.

Patented Jan. 30, 19117.

Application filed January 13, 1913. Serial No. 741,623.

To all whom it may concern:

Be it known that I, CI-IAnLns KILBURN, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Stone-Tools, ofwhichthe following is a specification.

My invention relates to stone tools and more particularly to pneumaticsurfacing machines for surfacing stones.

The object of my invention is to provide a surfacing machine which canbe used for fiat, concave or convex surfaces, and which will operate thecutting tool in an are when cutting the concave or convex surfaces.

In the art of cutting stones with the machines now in use it iscustomary to cut the concave or convex surfaces with the cutting toolbeing adjusted in a horizontal plane, thereby cutting a series ofstraight surfaces or bevels on the stone, after which it is necessary totrim the ridges which have thereby been produced to properly shape thestone. It is this disadvantage that my machine isintended to overcome,as well as the disadvantage experienced of having to move the stoneconsiderably to position it properly for the cutting of each bevel.

My invention consists of a machine constructed in such a manner, as toallow the cutting tool to be adjusted perpendicularly and radially withrelation to the main frame of the machine, the radial movement beingboth in a horizontal and vertical plane.

My invention consists further in certain parts and combinations of partsas will be described in the following specifications and pointed out inthe appended claims.

In the drawings: Figure 1 is a front elevation of a machine constructedin accordance with my invention. Fig. 2 is a side elevation of the same.Fig. 3 is an enlarged view of the adjustable frame employed in myinvention. Fig. 4c is a view of the circular gear rack employed in myinvention. Fig. 5 is a. detail sectional view taken on the line 55 ofFig. 3. Fig. 6 is a detail perspective view of a portion of one of theoperating shafts employed in my invention.v

Fig. 7 is a sectional view taken through the swivel bearing for the armwhich carries the tool showing the tool carrying arm in position. Figs.8 and 9 are enlarged detail views of the windlass mounted at the bot tomof the machine for raising and lowering the adjustable frame; and Fig.10 is an elevational view showing the adjustable frame adjusted to cut aconcave surface.

Referring more particularly to the drawings 1 represents a standardpreferably of the rectangular shape, and preferably constructed ofchanneled steel. The standard is preferably mounted on a truck 2 havingsuitable wheels 3 which may be adapted to operate on a track orotherwise.

A carriage 4 is provided and is adapted to slide perpendicularly on thestandard 1, and consists of the circular gear rack 5 upon which thebrackets or sliding bearings 6 are mounted. The sliding bearings 6 arepreferably provided with rollers 7 which engage the standard 1 and allowthe carriage to 0perate smoothly thereon.

The standard 1 is also provided with pulleys 8 and 9 over which a cable10 passes. The cable 10 is fastened at the top of the standard 1 at 11and passes down around a pulley 12 on the carriage 1 and then around thepulley 8 on the standard as shown in Fig. 1. The cable then crosses atthe top of the standard 1 to the pulley 9 on the other side of thestandard 1 and then down around another pulley 12 on the respective sideof the carriage and then over a pulley 1d at the top of the standard,which pulley is set at an angle to allow the cable after passing overthe pulley to extend down the inside of the channel standard 1 to awindlass 15 having an operating handle or wheel 16 thereon. Thus it isseen that the carriage may be raised or lowered by winding or unwindingthe cable on the windlass. A ratchet 17 is provided and is adapted to beengaged by a dog 18 which prevents the windlass from unwinding. Howeverthe dog may be disengaged to allow the windlass to be unwound to lowerthe carriage.

A rotating carrier 19 is mounted on the carriage 4 by means of rollers20 and. pinion gears 21 thereon, the gear rack 5 of the carriage passingtherebetween as best illustrated in Fig. 3. The rotating carrierconsists of the rectangular frame 19 preferably constructed of channeledsteel as shown in Figs. 3 and 5. The pinion gears 21 are adapted to beoperated in order to cause them to travel on the circular gear rack 5 ofthe carriage in order to rotate the carrier 19 thereon. These piniongears 21 have a bevel pinion 22 on their rear side as best shown in Fig.5 and are mounted in a block 23 in the channel steel carrier frame 19.These bevel pinion gears mesh with pinion gears 24 tightly mounted on avertically disposed shaft 25 which is suitably journaled in the channelsteel carrier frame 19. At the lower ends of the shafts 25 I providegears 26 tightly mounted thereon which mesh with gears 27 mounted onshafts 28 running parallel with the sides of the carrier frame 19 andjournaled therein at 29 and 30. The shaft 28 is provided with asplinevvay 31 as best shown in Fig. 6.

A tool beam bracket 32 is mounted on the rotating carrier 19 by means ofthe flanges 33 gripping the edges of the channeled frame 19, and isadapted to slide thereon. Pinion gears 34 tightly mounted on a shaft 35journaled in journals 37 on the tool beam bracket 32 are provided andare adapted to engage the gear racks 38 on the rotating carrier channelframe 19 as best shown in Figs. 1 and 2. The shaft 35 is provider withthe operating wheels or handles 39 so as to provide means for raisingand lowering the tool beam bracket.

As seen in the drawings the tool beam bracket 32 is rectangular in shapeand is provided with a lower connecting portion 32, in which the shaft40 is j ournaled. The shaft 40 carries a hand wheel 41 at its outer endand a beveled pinion gear 42 at its in ner end (Fig. 3). The beveledpinion gear '42 meshes with two bevel pinion gears 43 and 44 mounted onthe inner ends of shafts 45 and 46, respectively. These shafts aresuitably journaled on the cross portion 32 and have bevel gears 47 and48 at their outer ends. The bevel gears 47 and 48 mesh with the bevelgears 49 and 50, respectively,

which are mounted on the shafts 28, which are provided with thesplineways 31. The bevel gears 49 and 50 are provided with the keys orfeathers to engage the splineway 31 in the shafts 28, thereby allowingthe bevel gears 49 and 50 to slide thereon, but causing them to rotatethe shafts 28 therewith. Thus when the hand. wheel 41 is operated thepinion gear 42 is operated, thereby operating the bevel gears 43, 44, 47and 48, which in turn operate the bevel gears 49 and 50 on the shafts28, thereby operating the shafts 28 which operate the gears 26 by meansof the gears 27 mounted at the ends thereof. When the gears 26 areoperated the shafts 25 are rotated thereby rotating the bevel gears 24,which in turn operate the pinion gears 21, thereby causing the carrierframe 19 to rotate on the circular gear rack 5 of the carriage 4.

The tool beam bracket is provided with a swivel beam holder 51 providedwith rollers 52 suitably j ournaled therein, upon which the tool beam 53is adapted to ride. The swivel beam holder is preferably journaled inthe tool beam bracket 32 and provided with ball bearings 54. The swivelbeam holder 51 may be provided with any desired type of bearing so as tocause the tool beam holder to properly rotate on the tool beam bracket.When it is desired to use the machine on flat surfaces, the pins 55 arewithdrawn from their sockets and the tool beam holder is then free torotate on the bearings 54. In order to hold the tool beam rigidly in thetool beam bracket, I provide pins 55 which pass through suitableopenings provided in the tool beam bracket and swivel beam holder 51.The beam is thereby held rigid against rotating or swinging in a hori-Zontal plane when the machine is being used on concave or convexsurfaces.

The tool beam is provided with gear racks 56 and 57 at the top andbottom thereof respectively. These gear racks are adapted to be engagedby a pinion gear 58 (Fig. 7) mounted on a shaft 59 upon which is mounteda hand wheel 60. Thus the tool beam is moved longitudinally in theswivel beam holder 51 to adjust the pneumatic hammer machine 61 to anypoint desired to the side of the device.

The pneumatic hammer 61 is of the ordinary construction, but is mountedin a bracket 62 which is adapted to be inverted in its position on thetool beam. The bracket is secured to the tool beam by means of the screwor bolt 63 which can be loosened to allow the pneumatic hammer to beinverted on the tool beam. This is necessary when it is desired to cut aconcave surface because of the fact that it is necessary then to raisethe carriage 4 up near the top of the stand ard 1 and then rotate therotatable carrier 19, thus bringing the tool beam below the center ofrotation. The tool beam is then inverted in its position and thepneumatic tool is rotated on the bracket 62 at the end of the tool beam.The tool beam is. preferably provided with the bracket 64 at the endthereof to form convenient means of fastening the bracket 62 thereto. I7

It is customary for the workman who uses the ordinary surfacing machinesto hold the tool into engagement with the pneumatic hammer with hishand. With my machine this would be diflicult when a concave or convexsurface was being cut, inasmuch as the workman has to operate two handwheels, one for the adjustment of the lengthwise movement of the toolbeam, and the other the rotating movement of the rotating carrier.Therefore I provide a spring 65 on the bottom of the bracket 62, whichis bent to reach the cutting tool, and has a suitable clamp 66 forholding the cutting tool into engagement with the pneumatic hammer.

Many modifications of my invention may be made without departing fromits spirit and scope and I do not wish to be confined to the exactdetails shown.

What I claim as new and desire to secure by Letters Patent is 1. Adevice of the character described comprising a standard open at thecenter thereof, a carriage open at the center thereof, adapted to beadjusted perpendicularly on said standard, a circular gear rack formingpart of said carriage and open at the center whereby a column to besurfaced may be passed through the entire device, and means on saidcarriage for supporting a hammer tool, means on the carriage foradjusting the hammer whereby the tool is operated around the surface ofthe column inserted through the device.

2. In a stone surfacing machine, the combination with a standard; of acarriage comprising bearings allowing for its movement in a planeparallel with the length of said standard and a circular gear rack openat he center thereof after being properly mounted on said standard, arotating carrier open at the center after being mounted on saidcarriage, and being provided with pinion gears for cooperation with thesaid circular gear rack of said carriage, a tool beam bracket slidablealong the entire length of said rotating carrier, a swivel beam holderon said tool beam bracket being adapted to swing in a plane transversethe length of said rotatable carrier and a tool beam slidable in saidswivel beam holder in the line of its own length.

3. A device of the character described comprising a standard, a truck, acarriage adapted to be adjusted perpendicularly on said standard, saidcarriage comprising a circular gear rack mounted on slidable bearings,said slidable bearings adapted to engage the standard, a rotatingcarrier, pinion gears on said rotating carrier adapted to mesh with saidcircular gear rack, rollers on said rotating carrier adapted to engagethe circular gear rack, a tool beam bracket slidably mounted on saidrotatable carrier, a horizontal tool beam rotatably mounted in saidbracket and means for rotating said r0- tating carrier on said circulargear rack.

4. In a stone surfacing machine the combination with a standard, of acarriage, means for adjusting said carriage in a line parallel to thelength of said standard, a carrier rotatable in a plane parallel to thelength of said standard, independent means for rotating said carrier onsaid carriage, a tool beam bracket adjustable longitudinally on saidcarrier, independent means for accomplishing said adjustment, a toolbeam holder pivotally mounted on said tool beam bracket and adapted toswing in a plane transverse of the length of said carrier, a tool beamslidable in the line of its own length in said tool beam holder, meansfor holding said tool beam holder rigid against rotation in said toolbeam bracket and means for slidably operating said tool beam in saidtool beam holder.

CHARLES KILBURN.

Witnesses:

C. B. Wool), OLIVER W. SHARMAN.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

